How to reply a formal email?
I got an email from the company.
How could I answer this question FORMALLY?

Q : "What salary range are you seeking to be able to move to the US?"

A : I want ... $1000000000. :(

Question

How to reply a formal email?
I got an email from the company. 
How could I answer this question FORMALLY?

Q : "What salary range are you seeking to be able to move to the US?"

A : I want ... $1000000000. :(

Answer

The salary range I'm looking for/interested in is between $.... and $.... per month/per annum.
A salary range is the amount between two figures (amounts)